/Engine/Source/Runtime/Engine/Classes/Animation/BlendSpace.h
This is the runtime representation of a triangle. Each triangle stores its vertices etc in normalized space, with an index to the original samples.
struct FBlendSpaceTriangle
FBlendSpaceTria...
EdgeInfo
Info for the edge starting at the vertex index and going (anti-clockwise) to the next vertex
int32[NUM_VERTI...
SampleIndices
Indices into the samples
FVector2D[NUM_V...
Vertices
The vertices are in the normalized space - i.e. in the range 0-1.